Remove "high"-latency audio code path

content/common/media/audio_messages.h

Index: content/common/media/audio_messages.h
diff --git a/content/common/media/audio_messages.h b/content/common/media/audio_messages.h
index a13efa5eb527a2fb6d35f4bbe8d692f093afec6c..60b0b7cff015a51db5b4c435bfb9caf5a6f98543 100644
--- a/content/common/media/audio_messages.h
+++ b/content/common/media/audio_messages.h
@@ -36,30 +36,19 @@ IPC_STRUCT_TRAITS_END()
 
 // Messages sent from the browser to the renderer.
 
-// Sent by AudioRendererHost to renderer to request an audio packet.
-IPC_MESSAGE_CONTROL2(AudioMsg_RequestPacket,
-                     int /* stream id */,
-                     AudioBuffersState)
-
-// Tell the renderer process that the audio stream has been created, renderer
-// process would be given a ShareMemoryHandle that it should write to from
-// then on.
-IPC_MESSAGE_CONTROL3(AudioMsg_NotifyStreamCreated,
-                     int /* stream id */,
-                     base::SharedMemoryHandle /* handle */,
-                     uint32 /* length */)
-
-// Tell the renderer process that a low latency audio stream has been created,
-// renderer process would be given a SyncSocket that it should write to from
-// then on.
+// Tell the renderer process that an audio stream has been created.
+// The renderer process is given a shared memory handle for the audio data
+// buffer it shares with the browser process. It is also given a SyncSocket that
+// it uses to communicate with the browser process about the state of the
+// buffered audio data.
 #if defined(OS_WIN)
-IPC_MESSAGE_CONTROL4(AudioMsg_NotifyLowLatencyStreamCreated,
+IPC_MESSAGE_CONTROL4(AudioMsg_NotifyStreamCreated,
                      int /* stream id */,
                      base::SharedMemoryHandle /* handle */,
                      base::SyncSocket::Handle /* socket handle */,
                      uint32 /* length */)
 #else
-IPC_MESSAGE_CONTROL4(AudioMsg_NotifyLowLatencyStreamCreated,
+IPC_MESSAGE_CONTROL4(AudioMsg_NotifyStreamCreated,
                      int /* stream id */,
                      base::SharedMemoryHandle /* handle */,
                      base::FileDescriptor /* socket handle */,
@@ -94,10 +83,6 @@ IPC_MESSAGE_CONTROL2(AudioInputMsg_NotifyStreamStateChanged,
                      int /* stream id */,
                      AudioStreamState /* new state */)
 
-IPC_MESSAGE_CONTROL2(AudioMsg_NotifyStreamVolume,
-                     int /* stream id */,
-                     double /* volume */)
-
 IPC_MESSAGE_CONTROL2(AudioInputMsg_NotifyStreamVolume,
                      int /* stream id */,
                      double /* volume */)
@@ -109,10 +94,9 @@ IPC_MESSAGE_CONTROL2(AudioInputMsg_NotifyDeviceStarted,
 // Messages sent from the renderer to the browser.
 
 // Request that got sent to browser for creating an audio output stream
-IPC_MESSAGE_CONTROL3(AudioHostMsg_CreateStream,
+IPC_MESSAGE_CONTROL2(AudioHostMsg_CreateStream,
                      int /* stream_id */,
-                     AudioParameters /* params */,
-                     bool /* low-latency */)
+                     AudioParameters /* params */)
 
 // Request that got sent to browser for creating an audio input stream
 IPC_MESSAGE_CONTROL4(AudioInputHostMsg_CreateStream,
@@ -121,12 +105,6 @@ IPC_MESSAGE_CONTROL4(AudioInputHostMsg_CreateStream,
                      bool /* low-latency */,
                      std::string /* device_id */)
 
-// Tell the browser the audio buffer prepared for stream (stream_id) is
-// filled and is ready to be consumed.
-IPC_MESSAGE_CONTROL2(AudioHostMsg_NotifyPacketReady,
-                     int /* stream_id */,
-                     uint32 /* packet size */)
-
 // Start buffering and play the audio stream specified by stream_id.
 IPC_MESSAGE_CONTROL1(AudioHostMsg_PlayStream,
                      int /* stream_id */)
@@ -151,10 +129,6 @@ IPC_MESSAGE_CONTROL1(AudioHostMsg_CloseStream,
 IPC_MESSAGE_CONTROL1(AudioInputHostMsg_CloseStream,
                      int /* stream_id */)
 
-// Get audio volume of the stream specified by stream_id.
-IPC_MESSAGE_CONTROL1(AudioHostMsg_GetVolume,
-                     int /* stream_id */)
-
 // Get audio volume of the input stream specified by
 // (render_view_id, stream_id).
 IPC_MESSAGE_CONTROL1(AudioInputHostMsg_GetVolume,